CN110851999A - Ship electromagnetic characteristic testing system and method - Google Patents
Ship electromagnetic characteristic testing system and method Download PDFInfo
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- CN110851999A CN110851999A CN201911328261.5A CN201911328261A CN110851999A CN 110851999 A CN110851999 A CN 110851999A CN 201911328261 A CN201911328261 A CN 201911328261A CN 110851999 A CN110851999 A CN 110851999A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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Abstract
The invention discloses a ship electromagnetic characteristic testing system and a ship electromagnetic characteristic testing method, wherein the system comprises a ship platform simulation module, a radiation antenna and scatterer modeling module, a ship platform simulation model boundary condition module, a frequency sweep module and an electromagnetic characteristic calculation module, wherein the output end of the ship platform simulation module is connected with the input ends of the radiation antenna and scatterer modeling module, the output end of the radiation antenna and scatterer modeling module is connected with the input end of the ship platform simulation model boundary condition module, the output end of the ship platform simulation model boundary condition module is connected with the input end of the frequency sweep module, and the output end of the frequency sweep module is connected with the input end of the electromagnetic characteristic calculation module. The method can realize simulation estimation of interference of electromagnetic waves of different radiation antennas on the scatterer equipment of the ship platform, thereby providing a theoretical basis for design and installation of the radiation antennas on the ship platform.
Description
Technical Field
The invention relates to a ship electromagnetic characteristic testing system and method, and belongs to the technical field of ship testing.
Background
On the ship platform, an open space surrounded by the scatterers can be regarded as a cavity structure, the scatterers forming the cavity structure are sensitive devices, and the cavity has an amplification effect on an electromagnetic environment, so that the electromagnetic environment of the surrounding sensitive devices exceeds a limit value specified by a standard, and further the electromagnetic safety problem is caused.
The prior art lacks simulation estimation of interference of electromagnetic waves of different radiation antennas on scatterer equipment of a ship platform, and cannot provide theoretical basis for design and installation of the radiation antennas on the ship platform; the electromagnetic effect of the ship platform cavity can not be effectively tested, and the problem of electromagnetic safety caused by the electromagnetic effect of the cavity is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a system and a method for testing the electromagnetic characteristics of a ship.
In order to solve the technical problems, the invention provides a ship electromagnetic characteristic testing system which is characterized by comprising a ship platform simulation module, a radiation antenna and scatterer modeling module, a ship platform simulation model boundary condition module, a frequency sweep module and an electromagnetic characteristic calculation module, wherein the output end of the ship platform simulation module is connected with the input end of the radiation antenna and scatterer modeling module, the output end of the radiation antenna and scatterer modeling module is connected with the input end of the ship platform simulation model boundary condition module, the output end of the ship platform simulation model boundary condition module is connected with the input end of the frequency sweep module, and the output end of the frequency sweep module is connected with the input end of the electromagnetic characteristic calculation module.
In a preferred embodiment, the ship platform simulation module is used for establishing a ship platform simulation model; the radiation antenna and scatterer modeling module is used for modeling a radiation antenna of a ship platform; the ship platform simulation model boundary condition module is used for setting boundary conditions for a ship platform simulation model; the method comprises the following steps that a frequency sweep module is used for setting the in-band and out-of-band ranges of a radiation antenna in a ship platform simulation model, and setting a reasonable step length for carrying out frequency sweep simulation calculation; the electromagnetic property calculation module is used for calculating the electromagnetic property of the ship platform by utilizing electromagnetic field numerical calculation software.
The invention also provides a ship electromagnetic characteristic testing method, which is characterized by comprising the following steps:
step SS 1: establishing a ship platform simulation model;
step SS 2: modeling a radiation antenna of a ship platform;
step SS 3: setting boundary conditions for the ship platform simulation model;
step SS 4: setting the in-band and out-of-band ranges of a radiation antenna in a ship platform simulation model, and setting a reasonable step length to perform sweep frequency simulation calculation;
step SS 5: and calculating the electromagnetic property of the ship platform by using electromagnetic field numerical calculation software.
As a preferred embodiment, the establishing the ship platform simulation model in step SS1 specifically includes: establishing a simulation model in a computer by using FEKO software according to the electromagnetic structure of a scatterer on a ship platform, taking any point around the scatterer in the simulation model as an observation point to be researched, simulating in the FEKO software, calculating and analyzing to obtain the electric field intensity of the observation point under different emission frequencies of a radiation antenna, and judging that a cavity electromagnetic effect occurs if the electric field intensity of the observation point is mutated; and then changing the geometric dimension of the cavity structure on the ship platform and repeating the steps.
As a preferred embodiment, the changing the geometric dimension of the cavity structure on the ship platform specifically includes: changing the width, height or length of the cavity; wherein, the width of the cavity is the width of the scatterer; the height of the cavity is the height of the scatterer; the length of the cavity is a parameter related to the length of the scatterers and the distance between the scatterers, and the length of the cavity is equal to the sum of the lengths of all the scatterers forming the cavity and the distance between the scatterers.
As a preferred embodiment, the modeling of the radiation antenna of the ship platform in step SS2 specifically includes: according to the actual positions of the radiation antenna and the scatterer, a radiation antenna model is established above the ship platform, full-scale modeling is carried out on the radiation antenna according to the length and the diameter of the actual antenna, and the material of the radiation antenna is set to be steel material during modeling.
As a preferred embodiment, the modeling of the radiation antenna of the ship platform in step SS2 specifically further includes: the feed end of the radiation antenna is positioned at the front end of the ship platform provided with the radiation antenna, and a coaxial feed mode is adopted; the tail end of the radiation antenna is provided with a circular feed sheet, the feed sheet is provided with an excitation source, and the excitation source points to the circle center from the outermost end of the circular feed sheet, namely the sheath of the coaxial line points inwards; and simultaneously setting the input power value of the radiation antenna.
As a preferred embodiment, the setting of the boundary condition for the ship platform simulation model in step SS3 specifically includes: simulating the established ship platform simulation model and the radiation antenna modeling, wherein boundary conditions need to be established; the size of the boundary is required to meet the condition that the minimum distance between the simulation model and the boundary is more than or equal to one half wavelength, namely the wavelength corresponding to the lowest frequency.
As a preferred embodiment, the setting of the in-band and out-of-band ranges of the radiation antenna in the ship platform simulation model and the setting of the reasonable step size for performing the sweep frequency simulation calculation in step SS4 specifically includes: in a short wave frequency band, calculating the frequency band of 2 MHz-30 MHz, performing sweep frequency simulation calculation by taking a frequency point of 2MHz as an initial frequency and taking 3MHz as a step length until the frequency band reaches 30 MHz, and respectively calculating the electromagnetic radiation characteristics of the ship platform simulation model; if the frequency band is outside 40 MHz-60 MHz, the out-of-band electromagnetic property simulation is carried out in the frequency band.
As a preferred embodiment, the calculating the electromagnetic characteristics of the ship platform by using the electromagnetic field numerical calculation software in step SS5 specifically includes: utilizing electromagnetic field numerical calculation software based on a finite element algorithm, adopting a self-adaptive iteration mode, taking the difference of the calculation results of every two times as iteration precision, judging whether the iteration error is smaller than a set iteration error threshold value, and if the iteration error is not smaller than the iteration error threshold value, continuing iterative operation of the electromagnetic field numerical calculation software; and if the iteration error is smaller than the iteration error threshold, ending the simulation.
The invention achieves the following beneficial effects: the ship electromagnetic characteristic test system and the ship electromagnetic characteristic test method can realize simulation estimation of interference of electromagnetic waves of different radiation antennas on ship platform scatterer equipment, so that a theoretical basis is provided for design and installation of the radiation antennas on the ship platform; meanwhile, the electromagnetic effect of the ship platform cavity can be effectively tested, and the problem of electromagnetic safety caused by the electromagnetic effect of the cavity is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a preferred embodiment of the electromagnetic property testing system of the ship of the invention.
Fig. 2 is a schematic structural diagram of a preferred embodiment of the ship electromagnetic property testing method of the invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the invention provides a ship electromagnetic characteristic testing system, which is characterized by comprising a ship platform simulation module, a radiation antenna and scatterer modeling module, a ship platform simulation model boundary condition module, a frequency sweep module and an electromagnetic characteristic calculation module, wherein an output end of the ship platform simulation module is connected with an input end of the radiation antenna and scatterer modeling module, an output end of the radiation antenna and scatterer modeling module is connected with an input end of the ship platform simulation model boundary condition module, an output end of the ship platform simulation model boundary condition module is connected with an input end of the frequency sweep module, and an output end of the frequency sweep module is connected with an input end of the electromagnetic characteristic calculation module.
In a preferred embodiment, the ship platform simulation module is used for establishing a ship platform simulation model; the radiation antenna and scatterer modeling module is used for modeling a radiation antenna of a ship platform; the ship platform simulation model boundary condition module is used for setting boundary conditions for a ship platform simulation model; the method comprises the following steps that a frequency sweep module is used for setting the in-band and out-of-band ranges of a radiation antenna in a ship platform simulation model, and setting a reasonable step length for carrying out frequency sweep simulation calculation; the electromagnetic property calculation module is used for calculating the electromagnetic property of the ship platform by utilizing electromagnetic field numerical calculation software.
As shown in fig. 2, the invention further provides a ship electromagnetic characteristic testing method, which is characterized by comprising the following steps:
step SS 1: establishing a ship platform simulation model;
step SS 2: modeling a radiation antenna of a ship platform;
step SS 3: setting boundary conditions for the ship platform simulation model;
step SS 4: setting the in-band and out-of-band ranges of a radiation antenna in a ship platform simulation model, and setting a reasonable step length to perform sweep frequency simulation calculation;
step SS 5: and calculating the electromagnetic property of the ship platform by using electromagnetic field numerical calculation software.
As a preferred embodiment, the establishing the ship platform simulation model in step SS1 specifically includes: establishing a simulation model in a computer by using FEKO software according to the electromagnetic structure of a scatterer on a ship platform, taking any point around the scatterer in the simulation model as an observation point to be researched, simulating in the FEKO software, calculating and analyzing to obtain the electric field intensity of the observation point under different emission frequencies of a radiation antenna, and judging that a cavity electromagnetic effect occurs if the electric field intensity of the observation point is mutated; and then changing the geometric dimension of the cavity structure on the ship platform and repeating the steps.
As a preferred embodiment, the changing the geometric dimension of the cavity structure on the ship platform specifically includes: changing the width, height or length of the cavity; wherein, the width of the cavity is the width of the scatterer; the height of the cavity is the height of the scatterer; the length of the cavity is a parameter related to the length of the scatterers and the distance between the scatterers, and the length of the cavity is equal to the sum of the lengths of all the scatterers forming the cavity and the distance between the scatterers.
As a preferred embodiment, the modeling of the radiation antenna of the ship platform in step SS2 specifically includes: according to the actual positions of the radiation antenna and the scatterer, a radiation antenna model is established above the ship platform, full-scale modeling is carried out on the radiation antenna according to the length and the diameter of the actual antenna, and the material of the radiation antenna is set to be steel material during modeling.
As a preferred embodiment, the modeling of the radiation antenna of the ship platform in step SS2 specifically further includes: the feed end of the radiation antenna is positioned at the front end of the ship platform provided with the radiation antenna, and a coaxial feed mode is adopted; the tail end of the radiation antenna is provided with a circular feed sheet, the feed sheet is provided with an excitation source, and the excitation source points to the circle center from the outermost end of the circular feed sheet, namely the sheath of the coaxial line points inwards; and simultaneously setting the input power value of the radiation antenna.
As a preferred embodiment, the setting of the boundary condition for the ship platform simulation model in step SS3 specifically includes: simulating the established ship platform simulation model and the radiation antenna modeling, wherein boundary conditions need to be established; the size of the boundary is required to meet the condition that the minimum distance between the simulation model and the boundary is more than or equal to one half wavelength, namely the wavelength corresponding to the lowest frequency.
As a preferred embodiment, the setting of the in-band and out-of-band ranges of the radiation antenna in the ship platform simulation model and the setting of the reasonable step size for performing the sweep frequency simulation calculation in step SS4 specifically includes: in a short wave frequency band, calculating the frequency band of 2 MHz-30 MHz, performing sweep frequency simulation calculation by taking a frequency point of 2MHz as an initial frequency and taking 3MHz as a step length until the frequency band reaches 30 MHz, and respectively calculating the electromagnetic radiation characteristics of the ship platform simulation model; if the frequency band is outside 40 MHz-60 MHz, the out-of-band electromagnetic property simulation is carried out in the frequency band.
As a preferred embodiment, the calculating the electromagnetic characteristics of the ship platform by using the electromagnetic field numerical calculation software in step SS5 specifically includes: utilizing electromagnetic field numerical calculation software based on a finite element algorithm, adopting a self-adaptive iteration mode, taking the difference of the calculation results of every two times as iteration precision, judging whether the iteration error is smaller than a set iteration error threshold value, and if the iteration error is not smaller than the iteration error threshold value, continuing iterative operation of the electromagnetic field numerical calculation software; and if the iteration error is smaller than the iteration error threshold, ending the simulation.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The ship electromagnetic characteristic testing system is characterized by comprising a ship platform simulation module, a radiation antenna and scatterer modeling module, a ship platform simulation model boundary condition module, a frequency sweep module and an electromagnetic characteristic calculating module, wherein the output end of the ship platform simulation module is connected with the input ends of the radiation antenna and scatterer modeling module, the output end of the radiation antenna and scatterer modeling module is connected with the input end of the ship platform simulation model boundary condition module, the output end of the ship platform simulation model boundary condition module is connected with the input end of the frequency sweep module, and the output end of the frequency sweep module is connected with the input end of the electromagnetic characteristic calculating module.
2. The marine electromagnetic property testing system of claim 1, wherein said marine platform simulation module is configured to create a marine platform simulation model; the radiation antenna and scatterer modeling module is used for modeling a radiation antenna of a ship platform; the ship platform simulation model boundary condition module is used for setting boundary conditions for a ship platform simulation model; the method comprises the following steps that a frequency sweep module is used for setting the in-band and out-of-band ranges of a radiation antenna in a ship platform simulation model, and setting a reasonable step length for carrying out frequency sweep simulation calculation; the electromagnetic property calculation module is used for calculating the electromagnetic property of the ship platform by utilizing electromagnetic field numerical calculation software.
3. The test method of the ship electromagnetic property test system based on claim 1, characterized by comprising the following steps:
step SS 1: establishing a ship platform simulation model;
step SS 2: modeling a radiation antenna of a ship platform;
step SS 3: setting boundary conditions for the ship platform simulation model;
step SS 4: setting the in-band and out-of-band ranges of a radiation antenna in a ship platform simulation model, and setting a reasonable step length to perform sweep frequency simulation calculation;
step SS 5: and calculating the electromagnetic property of the ship platform by using electromagnetic field numerical calculation software.
4. The method for testing the electromagnetic characteristics of the ship according to claim 3, wherein the establishing of the ship platform simulation model in the step SS1 specifically comprises: establishing a simulation model in a computer by using FEKO software according to the electromagnetic structure of a scatterer on a ship platform, taking any point around the scatterer in the simulation model as an observation point to be researched, simulating in the FEKO software, calculating and analyzing to obtain the electric field intensity of the observation point under different emission frequencies of a radiation antenna, and judging that a cavity electromagnetic effect occurs if the electric field intensity of the observation point is mutated; and then changing the geometric dimension of the cavity structure on the ship platform and repeating the steps.
5. The method for testing the electromagnetic property of the ship according to claim 4, wherein the changing the geometric dimension of the cavity structure on the ship platform specifically comprises: changing the width, height or length of the cavity; wherein, the width of the cavity is the width of the scatterer; the height of the cavity is the height of the scatterer; the length of the cavity is a parameter related to the length of the scatterers and the distance between the scatterers, and the length of the cavity is equal to the sum of the lengths of all the scatterers forming the cavity and the distance between the scatterers.
6. The method for testing the electromagnetic characteristics of the ship according to claim 3, wherein the modeling the radiation antenna of the ship platform in step SS2 specifically comprises: according to the actual positions of the radiation antenna and the scatterer, a radiation antenna model is established above the ship platform, full-scale modeling is carried out on the radiation antenna according to the length and the diameter of the actual antenna, and the material of the radiation antenna is set to be steel material during modeling.
7. The method for testing the electromagnetic characteristics of the ship according to claim 6, wherein the step SS2 of modeling the radiation antenna of the ship platform further comprises: the feed end of the radiation antenna is positioned at the front end of the ship platform provided with the radiation antenna, and a coaxial feed mode is adopted; the tail end of the radiation antenna is provided with a circular feed sheet, the feed sheet is provided with an excitation source, and the excitation source points to the circle center from the outermost end of the circular feed sheet, namely the sheath of the coaxial line points inwards; and simultaneously setting the input power value of the radiation antenna.
8. The method for testing the electromagnetic characteristics of the ship according to claim 3, wherein the setting of the boundary conditions for the ship platform simulation model in the step SS3 specifically comprises: simulating the established ship platform simulation model and the radiation antenna modeling, wherein boundary conditions need to be established; the size of the boundary is required to meet the condition that the minimum distance between the simulation model and the boundary is more than or equal to one half wavelength, namely the wavelength corresponding to the lowest frequency.
9. The method for testing the electromagnetic characteristics of the ship according to claim 3, wherein the step SS4 of setting the in-band and out-of-band ranges of the radiation antenna in the ship platform simulation model and setting a reasonable step size for sweep frequency simulation calculation specifically comprises: in a short wave frequency band, calculating the frequency band of 2 MHz-30 MHz, performing sweep frequency simulation calculation by taking a frequency point of 2MHz as an initial frequency and taking 3MHz as a step length until the frequency band reaches 30 MHz, and respectively calculating the electromagnetic radiation characteristics of the ship platform simulation model; if the frequency band is outside 40 MHz-60 MHz, the out-of-band electromagnetic property simulation is carried out in the frequency band.
10. The method for testing the electromagnetic characteristics of the ship according to claim 3, wherein the step SS5 of calculating the electromagnetic characteristics of the ship platform by using the electromagnetic field numerical calculation software specifically comprises: utilizing electromagnetic field numerical calculation software based on a finite element algorithm, adopting a self-adaptive iteration mode, taking the difference of the calculation results of every two times as iteration precision, judging whether the iteration error is smaller than a set iteration error threshold value, and if the iteration error is not smaller than the iteration error threshold value, continuing iterative operation of the electromagnetic field numerical calculation software; and if the iteration error is smaller than the iteration error threshold, ending the simulation.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113076675A (en) * | 2021-04-12 | 2021-07-06 | 中国电子科技集团公司第三十三研究所 | Electromagnetic environment effect simulation design method for air cushion landing boat |
| CN113408095A (en) * | 2020-03-16 | 2021-09-17 | 启碁科技股份有限公司 | Electromagnetic characteristic analysis method and electronic device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110184A (en) * | 2011-03-14 | 2011-06-29 | 中国人民解放军海军航空工程学院 | Method for modelling numerical simulation model of electromagnetic characters of short-wave antenna of information returning system |
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- 2019-12-20 CN CN201911328261.5A patent/CN110851999A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110184A (en) * | 2011-03-14 | 2011-06-29 | 中国人民解放军海军航空工程学院 | Method for modelling numerical simulation model of electromagnetic characters of short-wave antenna of information returning system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113408095A (en) * | 2020-03-16 | 2021-09-17 | 启碁科技股份有限公司 | Electromagnetic characteristic analysis method and electronic device |
| CN113408095B (en) * | 2020-03-16 | 2023-08-29 | 启碁科技股份有限公司 | Electromagnetic characteristic analysis method and electronic device |
| CN113076675A (en) * | 2021-04-12 | 2021-07-06 | 中国电子科技集团公司第三十三研究所 | Electromagnetic environment effect simulation design method for air cushion landing boat |
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